A flexible, form-shaped device designed to be placed over the nose and mouth to deliver a proportional mixture of air/oxygen (O2) to a patient's airway. It is typically non-sterile, non-conductive, and is available in a range of sizes. It is made of high-grade resins and/or other materials that produce a soft, flexible mask that will create an airtight seal against the patient's face. The device may include a headstrap and various valves and connectors which may allow for connection to a central vacuum system to enable scavenging of residual (waste) anaesthetic gas from a patient in recovery. This is a single-use device.